Riveting machinery



C. R. ENGEL.

RIVETING MACHINERY.

APPLICATloN man sEPT.15, 1919.

Patented July 59 i921..

3 SHEETS-SHEET l MVQJ C. R. ENGEL.

RIVETING MACHINERY.

APPLICATION FILED SEPT. I5. I9I9.

Patented July 5, WZL

3 SHEETS-SHEET 2 INvENToR l MM. W- @172i C. R. ENGEL.

RIVETING MACHINERY.

APPLICATION FILED SEPT. I5. 1919.

3 SHEETS-SHEET 3.

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INVENTOR f. 17M

CIL-1 UNHTD STATES narrar erstes,

GHARLES REIKI ENG-Ella', 01E' YGMAN, WASHINGTON.

s REVIIETING MACHINERY.

lof Washington, have invented certain 1mprovements in Riveting Machinery, of which the following is a specification.

My invention, relates to machinery 1n which al reciproicating motion is required, and in which the entire reciprocating parts can be forcibly lowered, without stopping the reciprocation, for Ysuch work as riveting, chiseling, mortising, etc., thereby causing a steady progression in the work being executed.

Such machinery, usually driven by. belting connected' with a line-shaft, must bear a certain relation to the line-shaft, because of the very limited ways in which belting can be caused to transmit power.

'My invention has for its object the elimie nation of these drawbacks, and to provide a machine that can be placed anywhere, regardless of the position of other machinery, or line-shafting. This machine 1s to be driven by compressed air which can be led anywhere by means of a pipe. .l y

With this object in view my invention consists in the construction and combination of elements as hereinafter described.

Referring to the drawings: Figure 1 is a side elevation of the entire machine with a cross-section through a portion of the column showing the counter-Weight, and with a cross-section through the pneumatic hammer showing all the movements of the reciprocating parts, and a cross-section through a portion of the hammer supporting arm, showing the teeth of the pinion engaged with the rack on the hammer barrel; Fig. 2 is a side elevation of the pinion, pulldownv handle, and operating valve; Fig.` 3 is an end elevation of Fig. 2 showing a cross-section on line a-a of Fig. 2; Fig. 4 is a cross-section of a foot valve to be used in lieu of the valve in handle; Fig. 5 is a front elevation of the entire machine, showing the :toot valve in dot and dash lines. u

Referring in detail to the drawings. 1s the base with means provided for receiving and clamping the column 2, which is cylindrical and hollow, thereby roviding a space for the counterweight 3. n top of the column is a cap l with means provided for receiving the pulleys 5 and 6; over these pulleys and through the cap, and into the Specification of Letters Patent.

Patented July 5, 1921i..

Application filled September 15, 1919; Serial No. 323,841. i

column, moves a chain or cable which is flexible and connected to 3 atone end and 7 at the other end. 8 is the hammer suppoi'ting arm which can be raised or lowered or rotated on and around` 2, this arm is also provided with means for clamping it fast to i 2. The outer end of 8 is adapted to receive the barrel of the pneumatic hammer 9, this barrel'has teeth 10, known vas a rack cut on a portion of its face; these teeth engage with similar teeth cut on pinion- 11,- which is rotated or oscillated by means of handle 12. '-llhe barrel 9 issuitably bored to accommodate the reciprocating piston or hammer 13; in the lower end of the barrel is driven a tool-bushing 111, the lower end is also fitted with a tool-retaining, Number 16 is the collar and 17 the tool. The 'upper end of the barrel is adapted to receive the barrel-head 18, and the air-distributing-head 19, and the pipe-fitting 7 to which is fastened a flexible tube 20. The other end of this tube is connected to nipple 21, which is fastened into valve-cage 22.

lThis valve-cage is adapted to receive handle 12, and nipple 23, on which is fastened an other flexible tube 24, which is connected directly to' the source of supply of the com'- pressed air.

The innerend of handle 12 is shaped so as to form a seat for valve 25, whose stein runs through the entire length of handle 12, and on whose outer, extended end is fastened a push-button 26. 1n order to keep this valve closed except when pressure is applied to 26, a compression spring 27, is provided, one end of which seats in a recess in the head of valve 25, and the other end seats in a deep recess in nipple 23. 35 is the body of the foot valve suitably machined to accommodate valve 36 (on whose upper end is f astened a push button 37) and plug 38 which is recessed to act as a retainerfor the compression spring 39 which kes valve closed except when pressure is applied to 37.

When foot valve is used in lieu of valve in handle the source of air is connected to opening 10 thence it passes through valve opening when pressure is applied to 37, to Outlet L11 to which isconnected tube 20. The air now :follows precisely the course as hereinafter described.-

1n operation, the handle 12 is grasped and lowered so as to bring tool down on the work, then pressure is applied to 26 by means of the thumb; this action opens valve collar-housing 15.

25 and permits the compressed vair which flows through the hollow nipple 23, to pass through the valve into the end of handle 12, thence through a hole bored at right angles to the axis of handle and connecting with the hollow nipple'21 into the tube y20; this tube conveys the air to 7 which is hollow and passes the air to 19 which distrib. utes the air through holes 28 in 18 and then through holes 29 bored in the barrel parallel to its axis and surrounding the piston chamber until it reaches the recess 30.

The air now exerts its pressure under the shoulder of the piston 13 and forces the piston upward until the holes 31, in the -lower end` of piston come into alinement with the recess 30, of the barrel; the air now` passes through these holes 31, into the chamber of the piston 32, and being checked in its upward rush, because of the head 1 18, it ynow expands and forcesl the piston \I claim and desire to downward until it strikes the tool 17. The air which is now underreduced compression is exhausting through the same port holes 31, through which it entered the piston, into the long recess 33 of the cylinder and thence through an exhaust port 34, which connects recess with atmosphere. This completes the two cycles of motion and this action will be repeated as long as the valve is kept open.

In the present embodiment of my invention the device is shown with a rivet-set in the tool-holding" end of the hammer. It is, however, understood that I do not wish to, limit my .device to riveting norl to restrict myself to the details of the construction shown, since various changes may be made by those skilled in the art without deviating from the principle of my invention.

Having thus described my invention, what secure by Letters Patent is: Y

l. A pneumatic machine comprising a main supporting standard provided with a base, a hammer supporting arm adjustably supported by said standar said arm being adapted 'to swing Aabout the axis of saidstandard and being adjustable of position along said axis, a pneumatic hammer suported by said hammer supporting arm, said hammer being provided with a rack engag ing with a pinion supported'by said arm, said pinion being provided with an operating lever whereby said hammer may be raised or lowered, means integral with said operating lever for controlling the air sup- 'ply ply to vsaid hammer, vided with means for holding tools adapted to pneumatic hammer work, said base acting as a support for the work to be executed, and means for counterbalancing the weight o said hammer and its attached elements.

2. A pneumatic machine of the class described comprising a main supporting member provided with a base and an extending arm, `a pneumatic hammer adjustably supported by said arm and being provided with a rack, a pinion supported by said arm and engaging with said rack on said hammer, said pinion being provided with an operating lever whereby said hammer may be raised or lowered by operating said lever, means integral with said lever for controlling the'air supply to said hammer, said hammer vbeing provided with means for holding tools adapted to pneumatic hammer work, said base acting as a support for the work to be executed, and means for counterbalancin the weight of said hammer and its attac ed elements.

3. In a pneumatic machine of the class described, the combination of a pneumatic l hammer, a supporting frame supporting said hammer and provided with a supporting table for work to be executed, means for raising and lowering said hammer in said frame, said means comprising a, pinion supported by said frame and engaging with a rack on said hammer and a lever for operat-v ing said pinion, and means associated with the operating lever of said pinion for controlling the air supply to said hammer.

4. Ina pneumatic described in combination with a pneumatic hammer supported by a frame, a means for raising and lowering said hammer in said frame and means lor controlling the air supply to said hammer, said means for raising and lowering said hammercomprising a, pinion provlded with an operating lever, said pinion being supported by said frame and adapted to engage with a rack on said hammer, said means for controlling the supto said hammer comprising a valve associated with said operating lever.

said hammer being pro-s machine of the class los In testimony whereof, I have signed my A name to'this specification in the presence of two subscribing' witnesses, Sept., 1919. a'

` CHARLES-REMI ENGEL. Witnesses: f

R. B. STEWART,' 1

LEE HUNTER.

this 5th day of 

